Toilet Sparkle

Twi, along with her other five friends, boarded the train. The discomfort she felt gradually got worse. Slowly, slowly, slowly, she got the urge to fart. The fries didn't sit well with her, but she refused to poot in front of all her friends and many other random ponies riding the train to Fillydelphia.

She started to shift a bit uncomfortably as the feeling got worse. She grunted a little, and AJ noticed. "You alright, sugarcube?" Applejack asked. Twilight quickly said she was fine, even though she knew that statement wasn't true. Twilight kept moving around, her face clearly showing how badly she felt. The ride was a three-hour journey, and she sure wasn't ready for it.

Twilight nervously pressed her rear end against the seat. She moaned and checked the watch Pinkie Pie had given her for a birthday party last year. 2 hours, 50 minutes left. She decided to try to get something that would take her mind off the growing pain in her abdomen. She had forgotten to bring a book along with her, but Rainbow dash had almost the entire series of Daring Do books.  Twilight whispered to Dash,